Improvement in wrench



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LUKE CHAPMAN, OF COLLINSVILLE. CONNECTICUT, ASSIG-NOR TO THE COLLINSCOMPANY, OF SAME PLACE.

Letters Patent No. 94,710, dated September14, 1869.

IMPROVEMENT IN WRENCH.

The Schedule referred to in these Letters Patent and making part of thelame.

To dll whom it 'may concern:

Be it known that I, LUKE CHAPMAN, of Collinsville, in the county of'Ha1'tf0rd, and State of Connecticut, have invented a new and usefulImprovement in Wrenches; and I declare the following to be a full andexact description thereof', reference being had to the accompanyingdrawings, and to the letters of reference marked thereon, forming a partof this specification.

My improvement relates to that description of wrenches popularly calledmonkey-wrenches.

In the drawings- Figure 1 is a side view 4of my improved wrench.

Figure 2 is a sectional view of my improved wrench, the front of thewrench being toward the observer.

Like letters indicate like parts in all the gures.

From Ithe nature of my improvement, it is only applicable, for goodservice, to wrenches made of caststeelor of wrought-iron. Malleable ironand castiron could be adopted, but without durability, and at great lossto manufacturer and consumer.

The letter a designates the head of the wrench, made of one piece, withthe barb, in the usual manner, which is fastened to the handle cby a nutat the lower end.

e is the movable jaw, sliding, as is usual, upon the bar b.

g is the nut, interiorly threaded and running upon the thread out uponthe front side of the wrench-bar,

as seen in the drawings.

It will be observed that the lower part'of the movable jaw e runs downupon the two at sides of the bar, through the nut g, and terminates uponeach side in the shoulder e.

Conceding thatA the parts are in this position, it will be readilyunderstood that as the nut g is rotated, so the movable jaw will bemoved up or down, as -desired.

Now .to explain how the parts are got into this position. While c and gare still separate from the rest of the wrench, the slender parts of e,terminating in the shoulders e', are pinched together and shoved throughthe nut g, and the natural spring of the parts (remembering that thematerialissteel or wroughtiron) will pressthe shoulders e e out againstthe nut. Now the movable jaw, the nut g being'on it, is pushed on overthe lower end of the bar b, the handle c is then secured on, and all theparts are then inthe position shown in the drawings.

I claim,as my invention- 'lhe movable jaw e, provided with the parts ce', in combination with the bar b and nut g, when constructed asdescribed, for the purpose set forth.

Dated June 19, 1869.

IKE CHAPMAN.

Witnesses:

CHAs. BLAIR, JOSHUA S. HEATH.

